basic ckt for 24 v to 5 ttl

Discussion in 'General Electronics Chat' started by vigi04, Jan 23, 2010.

  1. vigi04

    Thread Starter New Member

    Sep 9, 2009
    12
    0
    hi
    i want to know the basic circuit for converting a 24volts supply to 5 ttl..
    thank you..:confused::confused::(:)
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    What current will the circuit draw?
    Can you post a schematic?

    Greetings,
    Bertus
     
  3. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Do you mean that you wish to power a TTL-level 5v circuit from 24V?

    Or do you wish to know if 24V is present or not by testing from TTL level?
     
  4. Papabravo

    Expert

    Feb 24, 2006
    10,138
    1,787
    The LM393 or LM339 work very well in this application. You can configure it as a buffer or as an inverter. You do need to watch your common mode voltages however.
     
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